James k



I. K. PUTNAM.

PUMP.

APPLICATION FILED APR. I0.. I9I9.

Patented J une 8, 1920.

aww/whoa c/QMQS, @w/722 woz/nudo JAMES K. PUTNAM, OF TULSA, OKLAHOMA.

PUMP.

Specication of Letters latent.

Patented Julie 8, 1920.

Application filed April 10, 1919. Serial No. 289,047.

To all whom t may Concern.'

Be it known that I, JAMES K. PUTNAM, a citizen or' the United States, residing at Tulsa, in the county of Tulsa and State ot Oklahoma, have invented certain new and useful improvements in Pumps; and l do declare the following to be a full, clear, and eXact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to pumps, and it relates more specifically to an improved petroleum pump.

The main object of this invention is to provide a petroleum pump which is auto matically lubricated with strained oil, the straining of the lubricating oil being accomplished during the pumping'ot the oil from the oil well.

A further object is to provide a pump ot' this character with a straining and tiltering means which is exceedingly eiiicient in eliminating sand and grit from the lubricating oil, and which applies the thus iilteredA oil directly upon the working surface of the pump valve and other working or rubbing surfaces.

Another object oi'- the invention is to provide an improved supporting and limiting device which supports the working valve and its adjuncts, and which also supports sand-trap and a sand excluding washer, the latter preventing the Aaccumulation of sand around the periphery of the supporting de vice, so that such accumulation of sand will not prevent the supporting device and working valve from being withdrawn from the working barrel and tubing of the pump.

Another object is to provide a simple and very efficient cushioning means which prevents the operation oi the pump from wedging the supporting device in the working barrel to such an extent as to prevent the comparatively easy removal of the supportinO device.

lther objects and advantages may become apparent topersons who read thei'ollowing' details ot description in connection with the accompanying drawings, in which Figure l is a longitudinal sectional lview, the section being taken through the pump casing and working cylinder, while the remaining elements of the device are shown in elevation.

Fig. 2 is a view somewhat similar to Fig.

l, but showing all the parts except the valve stem and valve balls in longitudinal section. Fig. 3 is an enlarged longitudinal sec tional detail view.

Fig. 4 is a transverse sectional the line ,4 4 of Fig. 3.

. Referring to these drawings in detail, in which similar reference characters correview alongl spond with similar parts throughout the sevconnection, as indicated at 10, with the ball cage ll which forms a part of the working valve which is generally indicated by the numeral 12. This working valve also coniprises a section of pipe i3 around which a plurality of flexible washers la are fitted, and the upper washers have their peripheral flanges turned upward, whereas the lower ones have their peripheral flanges turned downward. This working valve is slid-able up and down in the working barrel l5, and av standing valve 17 is provided at the lower end of the barrel l5 for cooperation with the working valve in a manner which is well known to persons who are 'familiar with the art.

' The upper end of the working barrel has its inner surface outwardly ilared as indicated at 18, and the surface 18 is preferably smooth and polished, and receives the downA wardly tapering or reduced lower end ci the supporting member or housing 19, the liare of the working barrel and the taper or the housing being very gradual, so that the interlapped or inserted relation of the housing to the working barrel tends to hold them in perfect axial alinement with one another. Moreover, this relation insures such a tight fitting joint between the members l5 and that sand and grit cannot pass therethrough. 'lhe'housing 19 comprises an outer tube 20, an inner tube 2l and a screw-threaded boss 22, the latter substantially comprising an ex tension of the inner tube 2l, and this inner tube with its extension is open throughout its length, so that the valve stem S can extend therethrough, and so that the oil passes therethrough when being pumped. A flexible washer 23 surrounds the boss 22 and has its periphery pressed against the inner surI` face of the casing or tubing 5 so as to exclude sand and grit from the joint between the tubing or casing and the supporting member. A lock nut 24e engages lwith the threads of the boss 22 and holds the washer 23 in its useful position.

A sand-trap 25, having notches in its lower edge, is seated upon the upper end of the boss 22 and nut 24, this sand-trap having a central aperture through which the valve stem 8 extends and slides, the sandtrap also being adapted to rise above the boss 22 when oil is being pumped through the inner tube 21. A spring 27 surrounds the valve lstem between the head 9 and sandtrap 25, and its spring cooperates with the head 9 to stop the downward movement of the working valve before it reaches the standing valve, its spring action also cushioning the shock which would otherwise be sustained by the working valve and its adjuncts at the end of their downward stroke. Moreover, the spring 27 serves 'as a cushion for the sand-trap 25 in its upward movement.

The inner tube 2l and outer tube 22 are united at their upper ends, and the internal diameter of the outer tube is considerably greater than the outer diameter of the inner tube, so that an annular space 28 is provided between the tubular elements 2O and 21. A working tube 29 has its lower end somewhat enlarged, as shown at 30, so as to have sliding engagement with the working barrel 15, and this portion 30 is internally screwthreaded and thereby engaged with the ball cage 1l. At a short distance above the enlarged portion 3f), the working tube 29 formed with an annular shoulder 31, and an annular shoulder 32 is formed therein at a considerable distance above the shoulder 3l. Between the shoulders 31 and 32, the workving tube is provided with a plurality of annular series of perforations 33. The upper end portion. of the working tube 29 is slidably fittedvwithin the housing or duplex tubular member 19, and the length of the working tube 29 is such that a portion thereof is always within the outer tube 20.

A laterally perforated tubular element 311-. isformed with flared ends 35 and 36 which are seated respectively against the shoulders 31 and 32. The intermediate portion of the tubular element 34k is formed with lateral perforations 37 whichl preferably correspond in number and position to the perforations 33. A strainer, which is generally indicated by the numeral 38, is disposed in the space between the tubular element 34 and the working tube v29, between the apertures 33 and 37.

This st 1ainer 3S may be of a construction more clearly illustrated in Figs. 3 and l, in which 39 indicates a coarse wire screen, al() indicates a relatively fine wire screen and t-l indicates a piece of fabric between the coarse and fine wire screens. 1t will be seen, therefore, that when oil is being pumped through the inner tube 2l and tubular clement 3a, a portion of the oil passes through the perforations 37, and is thereby strained and immediately deposited upon the inner surface of the working barrel 15. A part of this strained and filtered oil enters the joint between the outer tube 2t) and the working barrel, a part of it enters the joint between the outer tube 2O and the working tube 29, and a part passes down between the working valve and the inner surface of the working barrel, thereby thoroughly lubricating all the working and removable parts with oil from which the sand and grit has been eliminated.

In order that the strainer and filtering device may have the maximum efficiencyv` lriack ing rings l2 are provided at each end of the strainer 38.

Although this embodiment of the invention is described very specifically, it is not intended to limit this invention to these exact details of construction and arrangement of )arts` but changes may be made within the scope of the inventive ideay expressed in the description and claims.

TWhat is claimed as this invention is 1. An oil-pump comprising a working barrel, a working valve operatable therein, and means to strain oil as it is being pumped and to deposit the strained oil on the surface of said working barrel against which said working valve operates,

2. In an oil-pump, a working valve, a tubular member united with and extending upward from the working valve and having perforations extending laterally therethrough, and a strainer covering the perforations.

3. In an oil-pump, a working valve, a tubular member united with and extending from said working valve and having perfo 'ations extending laterally therethrough, a perforated tubular member having fiared ends which are fitted against the inner surface of the first said tubular member so that its intermediate portion is laterally opposite to and spaced from the first said perforations7 and a strainer fitted in the space between the first and second said tubular members.

4. In an oil-pump, a working barrel, a working valve operatable therein, a working tube having perforations extending laterally therethrough and having shoulders above and below said perforations, a tubular element having fiared ends and a perforated intermediate portion, said tubular element Cil having its flared ends iitted respectively against said shoulders, a strainer fitted between the perforations of said working tube and said tubular element and providing spaces outlined by said strainer, working tube and tubular element, and packings fitted respectively in said spaces.

5. In an oil-pump, a working barrel, a working valve operatable therein and comprising a ball-cage, a working tube having its lower end secured to the working valve and surrounding said ball-cage, a duplex tube comprising an inner and an outer tube arranged concentrically and forming an annular space which is closed at its upper end and open at its lower end, said working tube extending into said annular space and having sliding engagement with said duplex tube, and an annular strainer in position to strain oil as it is being pumped and to deposit the strained oil on the sliding surfaces of the working valve and working tube.

6. In a pump comprising a working barrel and the tubing connected thereto, the combination of a duplex tube comprising an inner and an outer tube arranged concentrically and forming an annular space which is closed at its upper end and open at its lower end, said outer tube having the periphery of its lower end reduced, said' working barrel having the inner surface of its upper end enlarged and removably fitted around the tapered lower end of said outer tube, the remaining part oi' the working barrel being of slightly less internal diameter than the external diameter oi" the remaining part of said outer tube, a working valve slidable in said barrel, and a working tube secured to and extended up from said working valve into said annular space vand having perforations extending laterally therethrough.

7. In a pump comprising a wonking barrel and the tubing connected thereto, the combination of a duplex tube comprising an inner and an outer tube arranged concentrically and forming an annular space which is closed at its upper end and open at its lower end, the greater portion oi said duplex tube extending above said working barrel and being formed with a threaded boss on its upper end, a flexible washer surrounding said boss and having its periphery fitted against said tubing, a lock nut on said threaded boss and holding said washer in its eliective position to prevent sand from gravitating into the space between said tubing and duplex tube, and a piston operatable in said barrel and duplex tube.

8. In a pump-mechanism, the combination of a working valve, including a ballcage, a working tube united with and ex tending up from the working valve, a tubular housing having an opening extending axially therethrough and an annular space separated from and surrounding said opening, a sand-trap movable up and down on said housing, and a valve stem extending through said opening and sandtrap and having a head at its upper end and having its lower end secured to said ball-cage, said working tube having its upper end in the annular space of said housing, the head of said valve stem being spaced above said sand-trap to permit the movement of the latter and to permit the operating movement of the valve stem and its adjuncts relative to said housing, said head being screw threaded for connecting it with an operating rod.

9. In a pump-mechanism, a working valve, a laterally perforated working tube united with and extending up from said working valve, a housing having an annular space into which said working tube extends, said housing having a passage extending therethrough, a valve stem extending through said passage and having its lower end united with said working valve7 said valve stem having a head on its upper end, and a cushioning spring supported on said housing in the path of movement of sai-tl head, said head being connectible with suitable means for reciprocating it.

In testimony whereof I have hereunto set my hand.

' JAMES K. PUTNAM. Witnesses IVM. D. (nroDFREY, INEZ L. ROBINSON. 

